Every year, great white sharks travel over 12,000 miles from South Africa to Australia, charting a nearly perfect straight line across the ocean. And every year, they turn around and travel back.

In a world filled with modern navigation tools, there is still a place where the humble compass can be used. Knowing how to make a compass, and teaching others how to make one, serves to develop a ...

Earth is surrounded by a magnetic field generated by electric currents from within the planet. Compasses take advantage of this field to identify north and serve as a navigational aid. But one social ...